diff --git a/src/drivers/Spi.cpp b/src/drivers/Spi.cpp
index c85b90c1..e0b716fa 100644
--- a/src/drivers/Spi.cpp
+++ b/src/drivers/Spi.cpp
@@ -9,8 +9,8 @@ Spi::Spi(SpiMaster& spiMaster, uint8_t pinCsn) : spiMaster {spiMaster}, pinCsn {
   nrf_gpio_pin_set(pinCsn);
 }
 
-bool Spi::Write(const uint8_t* data, size_t size) {
-  return spiMaster.Write(pinCsn, data, size);
+bool Spi::Write(const uint8_t* data, size_t size, void (*TransactionHook)(bool)) {
+  return spiMaster.Write(pinCsn, data, size, TransactionHook);
 }
 
 bool Spi::Read(uint8_t* cmd, size_t cmdSize, uint8_t* data, size_t dataSize) {
diff --git a/src/drivers/Spi.h b/src/drivers/Spi.h
index 9b6a30f4..55eef05c 100644
--- a/src/drivers/Spi.h
+++ b/src/drivers/Spi.h
@@ -14,7 +14,7 @@ namespace Pinetime {
       Spi& operator=(Spi&&) = delete;
 
       bool Init();
-      bool Write(const uint8_t* data, size_t size);
+      bool Write(const uint8_t* data, size_t size, void (*TransactionHook)(bool));
       bool Read(uint8_t* cmd, size_t cmdSize, uint8_t* data, size_t dataSize);
       bool WriteCmdAndBuffer(const uint8_t* cmd, size_t cmdSize, const uint8_t* data, size_t dataSize);
       void Sleep();
diff --git a/src/drivers/SpiMaster.cpp b/src/drivers/SpiMaster.cpp
index 3446d639..4c2bc940 100644
--- a/src/drivers/SpiMaster.cpp
+++ b/src/drivers/SpiMaster.cpp
@@ -143,6 +143,9 @@ void SpiMaster::OnEndEvent() {
     }
 
     nrf_gpio_pin_set(this->pinCsn);
+    if (this->TransactionHook != nullptr) {
+      this->TransactionHook(false);
+    }
     currentBufferAddr = 0;
     BaseType_t xHigherPriorityTaskWoken2 = pdFALSE;
     xSemaphoreGiveFromISR(mutex, &xHigherPriorityTaskWoken2);
@@ -173,13 +176,14 @@ void SpiMaster::PrepareRx(const uint32_t bufferAddress, const size_t size) {
   spiBaseAddress->EVENTS_END = 0;
 }
 
-bool SpiMaster::Write(uint8_t pinCsn, const uint8_t* data, size_t size) {
+bool SpiMaster::Write(uint8_t pinCsn, const uint8_t* data, size_t size, void (*TransactionHook)(bool)) {
   if (data == nullptr)
     return false;
   auto ok = xSemaphoreTake(mutex, portMAX_DELAY);
   ASSERT(ok == true);
   taskToNotify = xTaskGetCurrentTaskHandle();
 
+  this->TransactionHook = TransactionHook;
   this->pinCsn = pinCsn;
 
   if (size == 1) {
@@ -188,6 +192,9 @@ bool SpiMaster::Write(uint8_t pinCsn, const uint8_t* data, size_t size) {
     DisableWorkaroundForFtpan58(spiBaseAddress, 0, 0);
   }
 
+  if (this->TransactionHook != nullptr) {
+    this->TransactionHook(true);
+  }
   nrf_gpio_pin_clear(this->pinCsn);
 
   currentBufferAddr = (uint32_t) data;
@@ -203,6 +210,9 @@ bool SpiMaster::Write(uint8_t pinCsn, const uint8_t* data, size_t size) {
     while (spiBaseAddress->EVENTS_END == 0)
       ;
     nrf_gpio_pin_set(this->pinCsn);
+    if (this->TransactionHook != nullptr) {
+      this->TransactionHook(false);
+    }
     currentBufferAddr = 0;
 
     DisableWorkaroundForFtpan58(spiBaseAddress, 0, 0);
@@ -217,7 +227,7 @@ bool SpiMaster::Read(uint8_t pinCsn, uint8_t* cmd, size_t cmdSize, uint8_t* data
   xSemaphoreTake(mutex, portMAX_DELAY);
 
   taskToNotify = nullptr;
-
+  this->TransactionHook = nullptr;
   this->pinCsn = pinCsn;
   DisableWorkaroundForFtpan58(spiBaseAddress, 0, 0);
   spiBaseAddress->INTENCLR = (1 << 6);
@@ -267,6 +277,8 @@ bool SpiMaster::WriteCmdAndBuffer(uint8_t pinCsn, const uint8_t* cmd, size_t cmd
 
   taskToNotify = nullptr;
 
+  this->TransactionHook = nullptr;
+
   this->pinCsn = pinCsn;
   DisableWorkaroundForFtpan58(spiBaseAddress, 0, 0);
   spiBaseAddress->INTENCLR = (1 << 6);
diff --git a/src/drivers/SpiMaster.h b/src/drivers/SpiMaster.h
index 8b698c57..9014061e 100644
--- a/src/drivers/SpiMaster.h
+++ b/src/drivers/SpiMaster.h
@@ -31,7 +31,7 @@ namespace Pinetime {
       SpiMaster& operator=(SpiMaster&&) = delete;
 
       bool Init();
-      bool Write(uint8_t pinCsn, const uint8_t* data, size_t size);
+      bool Write(uint8_t pinCsn, const uint8_t* data, size_t size, void (*TransactionHook)(bool));
       bool Read(uint8_t pinCsn, uint8_t* cmd, size_t cmdSize, uint8_t* data, size_t dataSize);
 
       bool WriteCmdAndBuffer(uint8_t pinCsn, const uint8_t* cmd, size_t cmdSize, const uint8_t* data, size_t dataSize);
@@ -50,6 +50,7 @@ namespace Pinetime {
 
       NRF_SPIM_Type* spiBaseAddress;
       uint8_t pinCsn;
+      void (*TransactionHook)(bool);
 
       SpiMaster::SpiModule spi;
       SpiMaster::Parameters params;
diff --git a/src/drivers/SpiNorFlash.cpp b/src/drivers/SpiNorFlash.cpp
index 28f82fe6..56a8aabd 100644
--- a/src/drivers/SpiNorFlash.cpp
+++ b/src/drivers/SpiNorFlash.cpp
@@ -22,7 +22,7 @@ void SpiNorFlash::Uninit() {
 
 void SpiNorFlash::Sleep() {
   auto cmd = static_cast<uint8_t>(Commands::DeepPowerDown);
-  spi.Write(&cmd, sizeof(uint8_t));
+  spi.Write(&cmd, sizeof(uint8_t), nullptr);
   NRF_LOG_INFO("[SpiNorFlash] Sleep")
 }
 
diff --git a/src/drivers/St7789.cpp b/src/drivers/St7789.cpp
index e583aac8..6824acd8 100644
--- a/src/drivers/St7789.cpp
+++ b/src/drivers/St7789.cpp
@@ -3,16 +3,17 @@
 #include <libraries/delay/nrf_delay.h>
 #include <nrfx_log.h>
 #include "drivers/Spi.h"
+#include "drivers/PinMap.h"
 
 using namespace Pinetime::Drivers;
 
-St7789::St7789(Spi& spi, uint8_t pinDataCommand, uint8_t pinReset) : spi {spi}, pinDataCommand {pinDataCommand}, pinReset {pinReset} {
+St7789::St7789(Spi& spi) : spi {spi} {
 }
 
 void St7789::Init() {
-  nrf_gpio_cfg_output(pinDataCommand);
-  nrf_gpio_cfg_output(pinReset);
-  nrf_gpio_pin_set(pinReset);
+  nrf_gpio_cfg_output(PinMap::LcdDataCommand);
+  nrf_gpio_cfg_output(PinMap::LcdReset);
+  nrf_gpio_pin_set(PinMap::LcdReset);
   HardwareReset();
   SoftwareReset();
   SleepOut();
@@ -29,18 +30,28 @@ void St7789::Init() {
   DisplayOn();
 }
 
+void St7789::EnableDataMode(bool isStart) {
+  if (isStart) {
+    nrf_gpio_pin_set(PinMap::LcdDataCommand);
+  }
+}
+
+void St7789::EnableCommandMode(bool isStart) {
+  if (isStart) {
+    nrf_gpio_pin_clear(PinMap::LcdDataCommand);
+  }
+}
+
 void St7789::WriteCommand(uint8_t cmd) {
-  nrf_gpio_pin_clear(pinDataCommand);
-  WriteSpi(&cmd, 1);
+  WriteSpi(&cmd, 1, EnableCommandMode);
 }
 
 void St7789::WriteData(uint8_t data) {
-  nrf_gpio_pin_set(pinDataCommand);
-  WriteSpi(&data, 1);
+  WriteSpi(&data, 1, EnableDataMode);
 }
 
-void St7789::WriteSpi(const uint8_t* data, size_t size) {
-  spi.Write(data, size);
+void St7789::WriteSpi(const uint8_t* data, size_t size, void (*TransactionHook)(bool)) {
+  spi.Write(data, size, TransactionHook);
 }
 
 void St7789::SoftwareReset() {
@@ -152,24 +163,23 @@ void St7789::Uninit() {
 
 void St7789::DrawBuffer(uint16_t x, uint16_t y, uint16_t width, uint16_t height, const uint8_t* data, size_t size) {
   SetAddrWindow(x, y, x + width - 1, y + height - 1);
-  nrf_gpio_pin_set(pinDataCommand);
-  WriteSpi(data, size);
+  WriteSpi(data, size, EnableDataMode);
 }
 
 void St7789::HardwareReset() {
-  nrf_gpio_pin_clear(pinReset);
+  nrf_gpio_pin_clear(PinMap::LcdReset);
   nrf_delay_ms(10);
-  nrf_gpio_pin_set(pinReset);
+  nrf_gpio_pin_set(PinMap::LcdReset);
 }
 
 void St7789::Sleep() {
   SleepIn();
-  nrf_gpio_cfg_default(pinDataCommand);
+  nrf_gpio_cfg_default(PinMap::LcdDataCommand);
   NRF_LOG_INFO("[LCD] Sleep");
 }
 
 void St7789::Wakeup() {
-  nrf_gpio_cfg_output(pinDataCommand);
+  nrf_gpio_cfg_output(PinMap::LcdDataCommand);
   SleepOut();
   VerticalScrollStartAddress(verticalScrollingStartAddress);
   DisplayOn();
diff --git a/src/drivers/St7789.h b/src/drivers/St7789.h
index b00bee03..185c44a0 100644
--- a/src/drivers/St7789.h
+++ b/src/drivers/St7789.h
@@ -8,7 +8,7 @@ namespace Pinetime {
 
     class St7789 {
     public:
-      explicit St7789(Spi& spi, uint8_t pinDataCommand, uint8_t pinReset);
+      explicit St7789(Spi& spi);
       St7789(const St7789&) = delete;
       St7789& operator=(const St7789&) = delete;
       St7789(St7789&&) = delete;
@@ -26,8 +26,6 @@ namespace Pinetime {
 
     private:
       Spi& spi;
-      uint8_t pinDataCommand;
-      uint8_t pinReset;
       uint8_t verticalScrollingStartAddress = 0;
 
       void HardwareReset();
@@ -45,7 +43,9 @@ namespace Pinetime {
       void SetAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1);
       void SetVdv();
       void WriteCommand(uint8_t cmd);
-      void WriteSpi(const uint8_t* data, size_t size);
+      void WriteSpi(const uint8_t* data, size_t size, void (*TransactionHook)(bool));
+      static void EnableDataMode(bool isStart);
+      static void EnableCommandMode(bool isStart);
 
       enum class Commands : uint8_t {
         SoftwareReset = 0x01,
diff --git a/src/main.cpp b/src/main.cpp
index ee6a6d3d..723c2e63 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -68,7 +68,7 @@ Pinetime::Drivers::SpiMaster spi {Pinetime::Drivers::SpiMaster::SpiModule::SPI0,
                                    Pinetime::PinMap::SpiMiso}};
 
 Pinetime::Drivers::Spi lcdSpi {spi, Pinetime::PinMap::SpiLcdCsn};
-Pinetime::Drivers::St7789 lcd {lcdSpi, Pinetime::PinMap::LcdDataCommand, Pinetime::PinMap::LcdReset};
+Pinetime::Drivers::St7789 lcd {lcdSpi};
 
 Pinetime::Drivers::Spi flashSpi {spi, Pinetime::PinMap::SpiFlashCsn};
 Pinetime::Drivers::SpiNorFlash spiNorFlash {flashSpi};
diff --git a/src/recoveryLoader.cpp b/src/recoveryLoader.cpp
index a0b4d784..56cb965f 100644
--- a/src/recoveryLoader.cpp
+++ b/src/recoveryLoader.cpp
@@ -45,7 +45,7 @@ Pinetime::Drivers::Spi flashSpi {spi, Pinetime::PinMap::SpiFlashCsn};
 Pinetime::Drivers::SpiNorFlash spiNorFlash {flashSpi};
 
 Pinetime::Drivers::Spi lcdSpi {spi, Pinetime::PinMap::SpiLcdCsn};
-Pinetime::Drivers::St7789 lcd {lcdSpi, Pinetime::PinMap::LcdDataCommand, Pinetime::PinMap::LcdReset};
+Pinetime::Drivers::St7789 lcd {lcdSpi};
 
 Pinetime::Controllers::BrightnessController brightnessController;